Opening and closing valve



FIG. 1 is a front, top, and right side perspective view of an openingand closing valve;

FIG. 2 is a rear, bottom, and left side perspective view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational viewbeing a mirror image of the front elevational view;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The broken lines shown in the figures are for the purpose ofillustrating portions of the opening and closing valve and form no partof the claimed design.

CLAIM The ornamental design for an opening and closing valve, as shownand described.